Sand mixer for sand core manufacturing
By using rotary support mechanism, stirring mechanism and feeding assembly in the sand mixer, the problem of aggregation and adhesion of adhesives and molding additives during the mixing process is solved, and higher mixing accuracy and sand forming quality are achieved.
Patent Information
- Application Number
- CN202510453175.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2025-06-27
AI Technical Summary
During the mixing process of existing sand mixers, binder and molding additives are prone to accumulate and adhere to the inner wall of the sand mixing cylinder, resulting in insufficient actual mixing amount and affecting the molding quality of the molding sand.
A sand mixer for sand core manufacturing is designed, using a rotary support mechanism, agitator and feeding assembly. The rotary support mechanism drives the mixing cylinder to rotate. The stirring mechanism stirs the original sand. The feeding assembly is uniformly fed with adhesive and molding additives, and the anti-adhesion assembly prevents the adhesive and molding additives from adhesion adhesion to the inner wall.
It effectively improves the accuracy of the actual mixing amount of adhesive and molding additives and the original sand, ensures the final forming quality of the molding sand, and prevents the accumulation and adhesion of the adhesive and molding additives.
Smart Images
Figure CN120205748A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of core sand manufacturing equipment, and in particular to a sand mixer for core sand manufacturing. Background Art
[0002] In the metal casting industry, the preparation of core sand is an important part of the casting process. During the preparation of core sand, it is necessary to evenly mix the raw sand, binder, and molding aids to make molding sand (or core sand). In the prior art, a sand mixer is usually used to complete the foregoing mixing step.
[0003] A sand mixer is a device that evenly mixes the components in the molding sand and effectively coats the binder on the surface of the sand grains. An existing sand mixer includes a mixing cylinder, a feed port provided at the top of the mixing cylinder, a support frame for supporting the mixing cylinder, a stirring shaft rotatably connected to the bottom of the mixing cylinder and extending into the inner cavity of the mixing cylinder, and a motor provided at the bottom of the mixing cylinder for providing power to the stirring shaft. It also includes stirring blades fixedly connected to the stirring shaft, a discharge door provided on the side of the mixing cylinder, and a driving mechanism for controlling the opening and closing of the discharge door.
[0004] During the use of the above sand mixer, basically, the raw sand, binder, and molding aids are simultaneously poured into the interior of the mixing cylinder through the feed port, and then the motor is started to drive the stirring shaft and the stirring blades to rotate, stirring the raw sand, binder, and molding aids inside the mixing cylinder, so that the raw sand is mixed with the binder and molding aids. However, in the foregoing operation steps, since the binder and molding aids are put into the mixing cylinder at the same time as the raw sand, the binder and molding aids put into the mixing cylinder are likely to accumulate together, making it easy to adhere to the inner wall of the mixing cylinder during the mixing process, resulting in the actual mixing amount of the binder and molding aids with the raw sand being less than the required amount, and thus easily affecting the final forming quality of the molding sand. Summary of the Invention
[0005] In order to improve the accuracy of the actual mixing amount of the binder and molding aids with the raw sand, thereby ensuring the final forming quality of the molding sand, the present application provides a sand mixer for core sand manufacturing.
[0006] The present application provides a sand mixer for core sand manufacturing, adopting the following technical solutions: A sand mixer for core manufacturing, comprising a frame, a sand mixing cylinder is arranged on the frame, and a rotary support mechanism for driving the sand mixing cylinder to rotate, an inlet for sand is arranged at the top of the sand mixing cylinder, feeding assemblies are arranged on both sides of the inlet on the sand mixing cylinder, the feeding assemblies are used for uniformly feeding a binder or a forming aid into the sand mixing cylinder, a stirring mechanism for stirring the raw sand, the binder and the forming aid is arranged in the sand mixing cylinder, and the stirring mechanism is connected with the rotary support mechanism, and an anti-adhesion assembly for preventing the binder and the forming aid from adhering to the inner wall of the sand mixing cylinder is further arranged in the sand mixing cylinder.
[0007] By adopting the above technical solution, the rotary support mechanism helps to drive the stirring mechanism to operate while driving the sand mixing cylinder to rotate; the stirring mechanism helps to stir the raw sand in the sand mixing cylinder; the two feeding assemblies help to uniformly feed the binder and the forming aid into the sand mixing cylinder, so that the binder and the forming aid are stirred and mixed with the raw sand in the sand mixing cylinder, which helps to prevent the binder and the forming aid in the sand mixing cylinder from accumulating together, thus helping to avoid the binder and the forming aid from adhering to the inner wall of the sand mixing cylinder as much as possible, and further helping to improve the accuracy of the actual mixing amount of the binder and the forming aid and the raw sand, and ensuring the final forming quality of the molding sand; the anti-adhesion assembly helps to further prevent the binder and the forming aid from adhering to the inner wall of the sand mixing cylinder, thus helping to further improve the accuracy of the actual mixing amount of the binder and the forming aid and the raw sand, and further helping to ensure the final forming quality of the molding sand.
[0008] In a specific feasible embodiment, the feeding assembly includes a mounting frame, a storage tank, a feeding pipe and a regulating valve, the mounting frame is arranged on the sand mixing cylinder, the storage tank is arranged on the mounting frame, the top end of the feeding pipe is communicated with the bottom of the storage tank, the bottom end of the feeding pipe is communicated with the top of the sand mixing cylinder, and the regulating valve is sleeved on the feeding pipe.
[0009] By adopting the above technical solution, the cooperation of the storage tank and the feeding pipe helps to feed the binder and the forming aid into the raw sand stirred in the sand mixing cylinder, thus helping to improve the mixing uniformity of the binder and the forming aid and the raw sand, and further helping to prevent the binder and the forming aid from accumulating together and adhering to the inner wall of the sand mixing cylinder, improving the accuracy of the actual mixing amount of the binder and the forming aid and the raw sand, and ensuring the final forming quality of the molding sand. The regulating valve helps to regulate the flow rate of the binder and the forming aid in the feeding pipe, thus helping to uniformly feed the binder and the forming aid into the raw sand in the sand mixing cylinder, and further improving the mixing uniformity of the binder and the forming aid and the raw sand.
[0010] In a specific feasible implementation, the rotary support mechanism includes a support frame and a rotary drive assembly for driving the support frame to rotate. The rotary drive assembly is arranged on the machine frame, the support frame is arranged on the rotary drive assembly, and the sand mixing cylinder is arranged on the support frame.
[0011] By adopting the above technical solution, the use of the rotary drive assembly helps to drive the rotation of the support frame, thereby helping to drive the sand mixing cylinder on the support frame to rotate synchronously; at the same time, the use of the rotary drive assembly helps to drive the operation of the stirring mechanism, thereby helping to use the stirring mechanism to stir the raw sand in the sand mixing cylinder.
[0012] In a specific feasible implementation, the rotary drive assembly includes a drive motor, a central gear, a planetary gear, and an internal gear ring. The drive motor is arranged on the bottom surface of the top wall of the machine frame, and the output shaft of the drive motor penetrates through the top wall of the machine frame. The central gear is rotatably arranged on the top surface of the machine frame and is coaxially connected to the output shaft of the drive motor. The internal gear ring is rotatably arranged on the top surface of the machine frame. The support frame is arranged on the internal gear ring. The internal gear ring is located on the outer periphery of the central gear and is coaxially arranged with the central gear. The planetary gear is arranged between the central gear and the internal gear ring, and both the central gear and the internal gear ring are engaged with the planetary gear.
[0013] By adopting the above technical solution, the use of the drive motor helps to drive the rotation of the central gear, thereby helping to drive the planetary gear to revolve around the central gear while rotating itself under the rotation cooperation of the internal gear ring; the rotation of the internal gear ring helps to drive the sand mixing cylinder to rotate in cooperation with the support frame, and the rotation of the planetary gear helps to drive the operation of the stirring mechanism, thereby helping to use the stirring mechanism to stir the raw sand in the sand mixing cylinder.
[0014] In a specific feasible implementation, a guiding ring is rotatably arranged on the top surface of the machine frame. The guiding ring is located between the central gear and the internal gear ring, and the rotating shaft of the planetary gear is rotatably connected to the guiding ring.
[0015] By adopting the above technical solution, the use of the guiding ring helps to guide the revolution trajectory of the planetary gear, thereby helping to improve the stability of the revolution process of the planetary gear.
[0016] In a specific feasible implementation, the stirring mechanism includes a stirring component and a material turning component. The stirring component is used for stirring and mixing the raw sand, binder, and molding aid in the sand mixing cylinder, and the material turning component is used for turning the raw sand, binder, and molding aid at the bottom of the sand mixing cylinder.
[0017] By adopting the above technical solution, the stirring assembly helps to stir the raw sand, binder and molding aid in the sand mixing cylinder, thereby helping to improve the mixing effect of the binder and molding aid with the raw sand. The turning assembly helps to turn over the raw sand, binder and molding aid located at the bottom inside the sand mixing cylinder, thereby helping to further improve the mixing effect of the binder and molding aid with the raw sand.
[0018] In a specific feasible embodiment, the stirring assembly includes a stirring shaft, a rotating frame, a mounting sleeve and stirring blades. The stirring shaft is arranged on the inner bottom wall of the sand mixing cylinder, and the stirring shaft is coaxially and fixedly connected to the rotating shaft of the planetary gear. The rotating frame is arranged at the top of the stirring shaft, and the circumferential edge of the rotating frame is in sliding fit with the inner wall of the sand mixing cylinder. The mounting sleeve is arranged on a section of the circumference of the stirring shaft located inside the sand mixing cylinder. The stirring blades are arranged on the mounting sleeve. There are multiple groups of stirring blades, and multiple groups of stirring blades are arranged at intervals in the vertical direction.
[0019] By adopting the above technical solution, the planetary gear helps to drive the stirring shaft to rotate, thereby helping to drive multiple groups of stirring blades to stir the raw sand, binder and molding aid in the sand mixing cylinder, and further helping to improve the mixing effect of the binder and molding aid with the raw sand. The rotating frame helps to limit the top of the stirring shaft, thereby helping to improve the stability of the stirring shaft and multiple groups of stirring blades during rotation, and further helping to improve the stirring effect of multiple groups of stirring blades on the raw sand, binder and molding aid in the sand mixing cylinder, and further improving the mixing effect of the binder and molding aid with the raw sand.
[0020] In a specific feasible embodiment, the turning assembly includes a connecting frame and a turning block. The connecting frame is sleeved on the bottom end of the mounting sleeve, and the circumferential edge of the connecting frame is in sliding fit with the inner wall of the sand mixing cylinder. The turning block is arranged on the connecting frame. The turning block is inclined, and the bottom edge of the turning block is in sliding fit with the inner bottom wall of the sand mixing cylinder.
[0021] By adopting the above technical solution, the stirring shaft helps to drive the mounting sleeve, connecting frame and turning block to rotate synchronously, thereby helping to use the turning block to turn over the raw sand, binder and molding aid located at the bottom inside the sand mixing cylinder, and further helping to improve the mixing effect of the binder and molding aid with the raw sand.
[0022] In a specific feasible embodiment, the anti-adhesion assembly includes a mounting column and an anti-adhesion scraping plate. The bottom end of the mounting column is connected to the connecting frame, the top end of the mounting column is connected to the rotating frame, the anti-adhesion scraping plate is arranged on the mounting column, and one side edge of the anti-adhesion scraping plate is in sliding fit with the inner side wall of the sand mixing cylinder.
[0023] By adopting the above technical solution, the rotating frame and the mounting frame are helpful for driving the mounting column and the anti-sticking scraper to rotate synchronously, thereby helping to scrape off the binder and the forming aid adhering to the inner wall of the sand mixing cylinder, and further helping to avoid the adhesion of the binder and the forming aid to the inner wall of the sand mixing cylinder as much as possible, improving the accuracy of the actual mixing amount of the binder and the forming aid with the raw sand, and ensuring the final forming quality of the molding sand.
[0024] In a specific feasible embodiment, a vibrating feeder is provided at the connection between the storage tank and the feeding pipe, and the vibrating feeder is used to cause the storage tank and the feeding pipe to generate high-frequency vibrations.
[0025] By adopting the above technical solution, the vibrating feeder is helpful for causing the storage tank and the feeding pipe to generate high-frequency vibrations, thereby helping to avoid the accumulation and blockage of the binder or the forming aid in the storage tank and the feeding pipe as much as possible, and further helping to improve the smoothness of feeding the binder or the forming aid into the sand mixing cylinder.
[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. Through the arrangement of the rotary support mechanism, the stirring mechanism and the feeding assembly, the rotary support mechanism is helpful for driving the stirring mechanism to operate while driving the sand mixing cylinder to rotate. The stirring mechanism is helpful for stirring the raw sand in the sand mixing cylinder, and the feeding assembly is helpful for uniformly feeding the binder and the forming aid into the interior of the sand mixing cylinder, so that the binder and the forming aid are stirred and mixed with the raw sand in the sand mixing cylinder, which helps to prevent the binder and the forming aid in the sand mixing cylinder from accumulating together, thereby helping to avoid the adhesion of the binder and the forming aid to the inner wall of the sand mixing cylinder as much as possible, and further helping to improve the accuracy of the actual mixing amount of the binder and the forming aid with the raw sand, and ensuring the final forming quality of the molding sand; 2. Through the arrangement of the anti-adhesion assembly, the anti-adhesion assembly is helpful for further preventing the binder and the forming aid from adhering to the inner wall of the sand mixing cylinder, thereby helping to further improve the accuracy of the actual mixing amount of the binder and the forming aid with the raw sand, and further helping to ensure the final forming quality of the molding sand. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 is the overall structural schematic diagram of the embodiment of the present application.
[0028] Figure 2 is the schematic diagram showing the specific structure of the rotary support mechanism.
[0029] Figure 3 is the schematic diagram showing the specific structures of the stirring assembly and the feeding assembly.
[0030] Figure 4It is a schematic diagram showing the specific structures of the material turning component and the anti-adhesion component.
[0031] Description of the reference numerals: 1, frame; 2, sand mixing cylinder; 3, sand inlet; 4, feeding component; 41, mounting rack; 42, storage tank; 43, feeding pipe; 44, regulating valve; 5, vibrating feeder; 6, support frame; 7, rotary drive component; 71, drive motor; 72, central gear; 73, planetary gear; 74, internal gear ring; 8, guiding ring; 9, stirring component; 91, stirring shaft; 92, rotating frame; 93, mounting sleeve; 94, stirring blade; 10, material turning component; 101, connecting frame; 102, material turning block; 11, anti-adhesion component; 111, mounting column; 112, anti-adhesion scraper. Detailed implementation manners
[0032] The following further elaborates on the present application with reference to the accompanying drawings.
[0033] An embodiment of the present application discloses a sand mixer for core manufacturing. Referring to Figure 1 and Figure 2 , it includes a frame 1. A rotary support mechanism is provided on the frame 1. The rotary support mechanism includes a rotary drive component 7. The rotary drive component 7 includes a drive motor 71, a central gear 72, planetary gears 73, and an internal gear ring 74. In this embodiment, the number of planetary gears 73 is three. The drive motor 71 is fixedly installed on the bottom surface of the top wall of the frame 1. The output shaft of the drive motor 71 extends upward and penetrates through the top wall of the frame 1. The central gear 72 is rotatably installed on the top surface of the frame 1, and the central gear 72 is coaxially and fixedly connected to the output shaft of the drive motor 71. The internal gear ring 74 is rotatably installed on the top surface of the frame 1. The internal gear ring 74 is located on the circumferential outer periphery of the central gear 72 and is coaxially arranged with the central gear 72. The three planetary gears 73 are arranged at intervals between the central gear 72 and the internal gear ring 74, and each planetary gear 73 meshes with both the central gear 72 and the internal gear ring 74. A guiding ring 8 is rotatably installed on the top surface of the frame 1. The guiding ring 8 is located between the central gear 72 and the internal gear ring 74 and below the three planetary gears 73. The rotating shaft of each planetary gear 73 is rotatably connected to the guiding ring 8.
[0034] Referring to Figure 1 and Figure 2 , the rotary support mechanism further includes a support frame 6. The support frame 6 is fixedly installed on the internal gear ring 74. Three sand mixing cylinders 2 are fixedly installed on the support frame 6. Each sand mixing cylinder 2 is coaxially arranged with a planetary gear 73. An inlet 3 for sand is provided at the top of each sand mixing cylinder 2.
[0035] Referring to Figure 1 and Figure 2, a quantitative amount of raw sand is fed into the interior of the sand mixing cylinder 2 through the sand inlet 3. The driving motor 71 operates to drive the central gear 72 to rotate, thereby driving the internal gear ring 74 to rotate synchronously under the transmission of the three planetary gears 73, and further causing the support frame 6 and the three sand mixing cylinders 2 to rotate synchronously; the three planetary gears 73 revolve around the central gear 72 while rotating on their own under the combined action of the central gear 72 and the internal gear ring 74. The guiding ring 8 helps to guide the revolution trajectory of the planetary gears 73, thereby helping to improve the stability of the revolution process of the planetary gears 73.
[0036] Refer to Figure 3 , a stirring mechanism is arranged inside the sand mixing cylinder 2. The stirring mechanism includes a stirring assembly 9. The stirring assembly 9 includes a stirring shaft 91, a rotating frame 92, a mounting sleeve 93 and a plurality of stirring blades 94. The stirring shaft 91 is rotatably installed on the inner bottom wall of the sand mixing cylinder 2, and the bottom end of the stirring shaft 91 is coaxially and fixedly connected to the rotating shaft of the planetary gear 73. The rotating frame 92 is fixedly installed at the top end of the stirring shaft 91, and the circumferential edge of the rotating frame 92 is slidably attached to the inner wall of the sand mixing cylinder 2. The mounting sleeve 93 is fixedly sleeved on the circumferential direction of the stirring shaft 91 located inside the sand mixing cylinder 2. A plurality of stirring blades 94 are fixedly installed on the mounting sleeve 93. The plurality of stirring blades 94 are divided into multiple groups, and the multiple groups of stirring blades 94 are arranged at intervals in the vertical direction.
[0037] Refer to Figure 3 , on both sides of the sand inlet 3 on each sand mixing cylinder 2, a feeding assembly 4 is arranged. The feeding assembly 4 includes a mounting frame 41, a storage tank 42, a feeding pipe 43 and a regulating valve 44. The mounting frame 41 is fixedly installed on the top surface of the sand mixing cylinder 2. The storage tank 42 is fixedly installed on the mounting frame 41. The top end of the feeding pipe 43 is fixedly communicated with the bottom of the storage tank 42. The bottom end of the feeding pipe 43 is fixedly communicated with the top of the sand mixing cylinder 2. The regulating valve 44 is fixedly sleeved on the feeding pipe 43. A vibrating feeder 5 is fixedly installed at the connection position of the storage tank 42 and the feeding pipe 43.
[0038] Refer to Figure 3, when the planetary gear 73 rotates, it drives the stirring shaft 91 and multiple groups of stirring blades 94 to rotate synchronously, so that the multiple groups of stirring blades 94 stir the raw sand inside the sand mixing cylinder 2, and then the raw sand inside the sand mixing cylinder 2 is in a flowing state; at the same time, the regulating valve 44 is opened to make the feeding pipe 43 in a communicating state, and the vibrating feeder 5 is turned on to make the storage tank 42 and the feeding pipe 43 generate high-frequency vibration. Under the action of the high-frequency vibration, the binder or molding aid inside the storage tank 42 is fed into the flowing raw sand inside the sand mixing cylinder 2 from the feeding pipe 43, which helps to prevent the binder and molding aid in the sand mixing cylinder 2 from accumulating together, thus helping to avoid the binder and molding aid from adhering to the inner wall of the sand mixing cylinder 2 as much as possible, and further helping to improve the accuracy of the actual mixing amount of the binder and molding aid with the raw sand, ensuring the final molding quality of the molding sand; after the binder and molding aid are fed into the sand mixing cylinder 2, the multiple groups of stirring blades 94 stir the raw sand, binder and molding aid inside the sand mixing cylinder 2, which helps to improve the mixing effect of the binder and molding aid with the raw sand, and further ensures the final molding quality of the molding sand.
[0039] Refer to Figure 4 , the stirring mechanism further includes a material turning component 10, and the material turning component 10 includes a connecting frame 101 and multiple material turning blocks 102. The connecting frame 101 is fixedly sleeved at the bottom end of the mounting sleeve 93, and the circumferential edge of the connecting frame 101 is slidably attached to the inner wall of the sand mixing cylinder 2. The multiple material turning blocks 102 are fixedly installed on the connecting frame 101, and each material turning block 102 is inclined, and the bottom edge of the material turning block 102 is slidably attached to the inner bottom wall of the sand mixing cylinder 2.
[0040] Refer to Figure 4 , when the multiple groups of stirring blades 94 stir the raw sand, binder and molding aid inside the sand mixing cylinder 2, the stirring shaft 91 drives the mounting sleeve 93, the connecting frame 101 and the multiple material turning blocks 102 to rotate synchronously, so as to turn over the raw sand, binder and molding aid located at the inner bottom of the sand mixing cylinder 2 through the multiple material turning blocks 102, which helps to further improve the mixing effect of the binder and molding aid with the raw sand, and further ensures the final molding quality of the molding sand.
[0041] Refer to Figure 4 , multiple groups of anti-adhesion components 11 are arranged inside the sand mixing cylinder 2. Each group of anti-adhesion components 11 includes a mounting column 111 and an anti-adhesion scraper 112. The bottom end of the mounting column 111 is fixedly connected to the connecting frame 101, the top end of the mounting column 111 is fixedly connected to the rotating frame 92, the anti-adhesion scraper 112 is fixedly installed on the mounting column 111, and one side edge of the anti-adhesion scraper 112 is slidably attached to the inner side wall of the sand mixing cylinder 2.
[0042] Refer to Figure 4, when the stirring shaft 91 drives the rotating frame 92 and the mounting frame 41 to rotate, multiple groups of mounting columns 111 and anti-sticking scrapers 112 rotate synchronously driven by the rotating frame 92 and the mounting frame 41, so that the multiple anti-sticking scrapers 112 scrape the binder and the forming aid adhering to the inner wall of the sand mixing cylinder 2, thereby helping to avoid as much as possible the adhesion of the binder and the forming aid to the inner wall of the sand mixing cylinder 2, improving the accuracy of the actual mixing amount of the binder and the forming aid with the raw sand, and further ensuring the final forming quality of the molding sand.
[0043] The implementation principle of the embodiment of this application is as follows: A quantitative amount of raw sand is fed into the interior of the sand mixing cylinder 2 through the sand inlet 3, the driving motor 71 operates to drive the central gear 72 to rotate, and thus drives the inner gear ring 74 to rotate synchronously under the transmission of the three planetary gears 73, so that the support frame 6 and the three sand mixing cylinders 2 rotate synchronously; the three planetary gears 73 revolve around the central gear 72 while rotating on their own under the combined action of the central gear 72 and the inner gear ring 74.
[0044] When the planetary gear 73 rotates on its own, it drives the stirring shaft 91 and multiple groups of stirring blades 94 to rotate synchronously, so that the multiple groups of stirring blades 94 stir the raw sand inside the sand mixing cylinder 2, and thus the raw sand inside the sand mixing cylinder 2 is in a flowing state; at the same time, the regulating valve 44 is opened to make the feed pipe 43 in a connected state, and the vibrating feeder 5 is turned on to cause the storage tank 42 and the feed pipe 43 to generate high-frequency vibration. The binder or the forming aid inside the storage tank 42 is fed into the flowing raw sand inside the sand mixing cylinder 2 from the feed pipe 43 under the action of the high-frequency vibration, which helps to prevent the binder and the forming aid in the sand mixing cylinder 2 from accumulating together, thereby helping to avoid as much as possible the adhesion of the binder and the forming aid to the inner wall of the sand mixing cylinder 2, and further helping to improve the accuracy of the actual mixing amount of the binder and the forming aid with the raw sand, ensuring the final forming quality of the molding sand; after the binder and the forming aid are fed into the sand mixing cylinder 2, the multiple groups of stirring blades 94 stir the raw sand, the binder and the forming aid inside the sand mixing cylinder 2, which helps to improve the mixing effect of the binder and the forming aid with the raw sand, and further ensures the final forming quality of the molding sand.
[0045] When the multiple groups of stirring blades 94 stir the raw sand, the binder and the forming aid inside the sand mixing cylinder 2, the stirring shaft 91 drives the mounting sleeve 93, the connecting frame 101 and the multiple turning blocks 102 to rotate synchronously, so as to turn over the raw sand, the binder and the forming aid located at the bottom inside the sand mixing cylinder 2 through the multiple turning blocks 102, thereby helping to further improve the mixing effect of the binder and the forming aid with the raw sand, and further ensuring the final forming quality of the molding sand.
[0046] When the stirring shaft 91 drives the rotating frame 92 and the mounting frame 41 to rotate, multiple groups of mounting columns 111 and anti-sticking scrapers 112 rotate synchronously under the drive of the rotating frame 92 and the mounting frame 41, so that the multiple anti-sticking scrapers 112 scrape the binder and the forming aid adhering to the inner wall of the sand mixing cylinder 2, thereby helping to avoid as much as possible the adhesion of the binder and the forming aid to the inner wall of the sand mixing cylinder 2, improving the accuracy of the actual mixing amount of the binder and the forming aid with the raw sand, and further ensuring the final forming quality of the molding sand.
[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.
Claims
1. A sand mixer for sand core manufacturing, characterized in that: The invention comprises a frame (1), wherein a sand mixing barrel (2) and a rotating support mechanism for driving the sand mixing barrel (2) to rotate are arranged on the frame (1), a sand inlet (3) is arranged on the top of the sand mixing barrel (2), and feeding components (4) are arranged on both sides of the sand inlet (3) of the sand mixing barrel (2), and the feeding components (4) are used to feed a binder or a molding aid into the sand mixing barrel (2) uniformly, and a stirring mechanism for stirring raw sand, a binder and a molding aid is arranged in the sand mixing barrel (2), and the stirring mechanism is connected to the rotating support mechanism, and an anti-adhesion component (11) for preventing the binder and the molding aid from adhering to the inner wall of the sand mixing barrel (2) is also arranged in the sand mixing barrel (2).
2. A sand mixer for making sand cores according to claim 1, characterized in that: The feeding assembly (4) comprises a mounting frame (41), a material storage tank (42), a material delivery pipe (43) and a regulating valve (44); the mounting frame (41) is arranged on the sand mixing cylinder (2); the material storage tank (42) is arranged on the mounting frame (41); the top end of the material delivery pipe (43) is connected to the bottom of the material storage tank (42); the bottom end of the material delivery pipe (43) is connected to the top of the sand mixing cylinder (2); and the regulating valve (44) is sleeved on the material delivery pipe (43).
3. A sand mixer for making sand cores according to claim 1, characterized in that: The rotary support mechanism comprises a support frame (6) and a rotary drive assembly (7) for driving the support frame (6) to rotate; the rotary drive assembly (7) is arranged on the frame (1); the support frame (6) is arranged on the rotary drive assembly (7); and the sand mixing cylinder (2) is arranged on the support frame (6).
4. A sand mixer for making sand cores according to claim 3, characterized in that: The rotary drive assembly (7) comprises a drive motor (71), a central gear (72), a planetary gear (73) and an inner gear ring (74); the drive motor (71) is arranged on the bottom surface of the top wall of the frame (1), and the output shaft of the drive motor (71) passes through the top wall of the frame (1); the central gear (72) is rotatably arranged on the top surface of the frame (1), and the central gear (72) is coaxially connected with the output shaft of the drive motor (71); the inner gear ring (74) is rotatably arranged on the top surface of the frame (1); the support frame (6) is arranged on the inner gear ring (74); the inner gear ring (74) is located on the circumferential periphery of the central gear (72) and is coaxially arranged with the central gear (72); the planetary gear (73) is arranged between the central gear (72) and the inner gear ring (74), and the central gear (72) and the inner gear ring (74) are both meshed with the planetary gear (73).
5. A sand mixer for making sand cores according to claim 4, characterized in that: A guide ring (8) is rotatably arranged on the top surface of the frame (1); the guide ring (8) is located between the central gear (72) and the inner gear ring (74); and the rotating shaft of the planetary gear (73) is rotatably connected to the guide ring (8).
6. A sand mixer for making sand cores according to claim 4, characterized in that: The stirring mechanism comprises a stirring component (9) and a turning component (10), wherein the stirring component (9) is used to stir and mix the raw sand, the binder and the molding aid in the sand mixing cylinder (2), and the turning component (10) is used to turn the raw sand, the binder and the molding aid at the bottom of the sand mixing cylinder (2).
7. A sand mixer for making sand cores according to claim 6, characterized in that: The stirring assembly (9) comprises a stirring shaft (91), a rotating frame (92), a mounting sleeve (93) and stirring blades (94); the stirring shaft (91) is arranged on the inner bottom wall of the sand mixing cylinder (2), and the stirring shaft (91) is coaxially fixedly connected with the rotating shaft of the planetary gear (73); the rotating frame (92) is arranged at the top end of the stirring shaft (91), and the circumferential edge of the rotating frame (92) is slidably fitted with the inner wall of the sand mixing cylinder (2); the mounting sleeve (93) is arranged on a circumferential section of the stirring shaft (91) located inside the sand mixing cylinder (2); the stirring blades (94) are arranged on the mounting sleeve (93); the stirring blades (94) are provided in a plurality of groups, and the plurality of groups of stirring blades (94) are arranged at intervals in the vertical direction.
8. A sand mixer for making sand cores according to claim 7, characterized in that: The material turning assembly (10) comprises a connecting frame (101) and a material turning block (102); the connecting frame (101) is sleeved on the bottom end of the mounting sleeve (93), and the circumferential edge of the connecting frame (101) is slidably fitted with the inner wall of the sand mixing cylinder (2); the material turning block (102) is arranged on the connecting frame (101), the material turning block (102) is inclined, and the bottom edge of the material turning block (102) is slidably fitted with the inner bottom wall of the sand mixing cylinder (2).
9. A sand mixer for making sand cores according to claim 8, characterized in that: The anti-adhesion component (11) comprises a mounting column (111) and an anti-adhesion scraper (112); the bottom end of the mounting column (111) is connected to the connecting frame (101); the top end of the mounting column (111) is connected to the rotating frame (92); the anti-adhesion scraper (112) is arranged on the mounting column (111), and one side edge of the anti-adhesion scraper (112) is slidably fitted with the inner wall of the sand mixing cylinder (2).
10. A sand mixer for making sand cores according to claim 2, characterized in that: A vibrating feeder (5) is provided at the connection between the material storage tank (42) and the material delivery pipe (43), and the vibrating feeder (5) is used to cause the material storage tank (42) and the material delivery pipe (43) to generate high-frequency vibration.